The Simpson Straight Shank Drill Bit 3/8 x 12 is a professional-grade carbide-tipped bit engineered for precise, reliable performance across structural and general drilling applications. Built by Simpson to exacting standards, this bit delivers the extended reach and consistent hole quality that contractors and tradespeople depend on for demanding, repetitive work.

Key Features

• Carbide tip construction - provides superior hardness and wear resistance compared to standard high-speed steel, keeping the bit cutting sharper for longer and reducing replacement frequency on the job
• Straight shank design - fits standard 3/8 in. and larger drill chucks on both corded and cordless drills, so no special equipment or adapters are required
• 12 in. overall length - gives the operator extended reach into deep cavities, tight spaces, and structural assemblies where shorter bits simply cannot access
• 10 in. usable drilling depth - accommodates a wide range of structural and general drilling tasks without needing to reposition or swap bits mid-application
• 3/8 in. diameter - delivers precise, consistent hole sizing for applications where exact tolerances matter, reducing the need for rework or correction
• Proprietary tip features - enhance drilling speed while improving ease of use, helping reduce operator fatigue during extended or high-volume drilling sessions

Why This Product

• Professional reliability from a trusted brand - Simpson is a recognized name in structural fastening and building hardware, and this bit reflects the same commitment to professional-grade quality that contractors rely on across critical applications
• Carbide tipping for long service life - the carbide tip is engineered for durability and wear resistance, making this bit a cost-effective choice for heavy-duty or repetitive drilling tasks where bit longevity directly affects productivity
• Broad chuck compatibility without compromises - the straight shank design works with the standard drill equipment most professionals already own, eliminating compatibility concerns and keeping workflows uninterrupted
• Reach and depth in one bit - with 12 in. of overall length and 10 in. of usable drilling depth, this single bit handles applications that would otherwise require specialty extensions or multiple tools

Specifications

• Model Number: MDB03712
• Shank Type: Straight
• Shank Diameter: 3/8 in.
• Drilling Depth: 10 in.
• Overall Length: 12 in.
• Tip Material: Carbide
• Brand: Simpson Strong-Tie
• Country of Origin: Germany

Frequently Asked Questions

What is the overall length and usable drilling depth of the MDB03712?

The MDB03712 has an overall length of 12 inches and a usable drilling depth of 10 inches, providing ample reach for a wide variety of structural and general drilling tasks.

What type of shank does this drill bit use?

This drill bit features a straight shank design, making it compatible with standard 3/8-inch and larger drill chucks commonly found on corded and cordless drills.

What makes the carbide tip on this bit beneficial?

The carbide tip is engineered for superior hardness and wear resistance compared to standard high-speed steel tips. It incorporates proprietary features that enhance durability and drilling speed while improving ease of use, making it ideal for professional-grade applications.

Note: Product dimensions or length may differ from picture. Please see the item description above for specifications.